John roger



2 Sheets-Sheet 1.

(No Model.)

J. ROGER. AUTOMATIC FEED MECHANISM.

Patented July 10, 1894.

WITNESSES ATTORNEY ms ncRms PETERS cu, Pumaurua. vusnmsrom o. c

2 Sheets-Sheet 2.

(No Model.)

J. ROGER. AUTOMATIC FEED MECHANISM;

Patented July 10, 1894.

ENTOR ATTORNEY UNITED STATEs j PATENT OFFICE.

JOHN ROGER, OF DENVER, COLORADO, ASSIGNOR OF ONE-HALF TO THOMAS B. STEARNS, OF SAME PLACE.

AUTOMATIC FEED MECHANISM.

SPECIFICATION forming part of LettersPatent No. 522,935, dated July 10, 1894;.

Application filed June 26, 1 8 93.

. the Queen of Great Britain, residing atDen ver,

. tion taken through the lower part of the hop in the county of Arapahoe and State of 0010- rado, have invented certain new and useful Improvements in Automatic FeedMechanism; and I do declare the following to be a f 1111, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains to make and use the same, reference beinghad to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in automatic feed mechanism.

This invention is especially designed for use in connection with ore-roasting furnaces, and the construction will be described in this specification as attached to a turret or annular furnace.

My improved construction will be fully understood by reference to the accompanying drawings, in which is illustrated an embodiment thereof.

In the drawings, Figure 1 is a section taken through an annular furnace provided with my improvement. Fig. 2 is a horizontal secper in which the feed roller is j ournaled. Fig. 3. is avertical section takenthrough the hopper and feed-roller. Fig. 4. is a fragmentary view in elevation of the feed mechanism. Fig. 5. is a fragmentary section of an annular furnace provided with the feed mechanism. Fig. 6. is a side elevation of the same.

Similar reference characters indicating oorresponding parts or elements of the mechanismin the severalviews, let the numerals 5 and 6 designate the outer and inner walls of the furnace, 7 the hearth, 8 the arch, 9 the' central rotating column, and 10 the rabblearms projecting into the roasting chamber.

Supported above an opening in the arch of the furnace is a feed chute, 12, to the upper extremity of which is attached the hopper, 13.

. In the upper portion of this chute and just I below the mouth of the hopper is located the corrugated feed roller, 14, journaled in the ends of the chute. At one end of the chute the journal projects far enough to attach a pinion, ,15, which is made fast thereto. To the rear of the roller journal and in the same Serial No. 478,838. (No model.)

horizontal plane therewith is located the shaft, 16, one extremity of which is j ournaled in the chute. This shaft is shown broken. It

may, however, extend across the furnace and be connected with a chute on the opposite side if it is desired to feed the ore or other material to the hearth at more than one point. The opposite extremity of the shaft may, however, be supported in any suitable manner.

The shaft, 16, is provided with a fast gear, 17, which meshes with the pinion, 15. The shaft, 16, is further provided with a fast ratchet disk, 18, located a short distance from the gear and engaged by a pawl or dog, 19, attached to a forked arm, 20, movably supported upon the shaft. The lower extremity of this arm is pivoted to one extremity of a connecting-rod, 26, the opposite extremity of which is pivoted to a lever, 21, supported upon a fulcrum, 22. The lower arm of the lever projects into the path of the rabblearmswhich are provided with lugs, 23, adapted to engage the extremity of the lever as the arms rotate. As the rabble-arm moves in a horizontal plane, and the lever extremity moves in the arc of a circle, the paths of the arm and the lever soon diverge sufficiently to release the lever which is returned to its normal position by a weighted arm,24, attached to the lever and occupying a position at right angles thereto.

The operation of the mechanism will be read ily understood. A quantity of ore is placed in the hopper, as shown at 25, Fig. 3. In the style of furnace shown, a series of rabblearms is attached to the rotating column. As the arms rotate each arm acts upon the lever, 21, and moves it to the position shown in dotted lines in Fig. 6. This movement of the lever actuates the arm, 20, through the medium of the connecting rod, 26. From'arm, 20, motion is transmitted to the feed roller, 14, through the medium of the ratchet and pawl, the shaft, 16, gear, 17, and pinion, 15, whereby the feed-roller is given a partial rotation every time the lever is actuated by a rabble-arm. At each movement of the roller a quantity of the ore is fed from the hopper to the chute and thence to the hearth of the furnace. The quantity of ore fed to the furnace during each movement of the feed-roller will, of course, depend upon the extent of said movement which may be controlled or regulated by varying the size of the gear, 17.

Having thus described my invention, what I claim is In a turret or annular furnace having rotating rabble-arms moving above the hearth, mechanism for feeding the ore to the hearth, consisting of a chute supported above an opening in the arch of the furnace and connected with a suitable hopper or receptacle for the ore, a roller longitudinally recessed and supported in the chute in proximity to the mouth of the hopper and provided with a spindleprojecting outside the chute, a lever JOHN ROGER.

Witnesses:

JAMES HENDERSON, MARY A. WHEELER. 

